CN110749130A

CN110749130A - Piping assembly and refrigerating system

Info

Publication number: CN110749130A
Application number: CN201911198286.8A
Authority: CN
Inventors: 邱文辉; 赵强; 张�浩
Original assignee: Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-02-04

Abstract

The invention discloses a piping component and a refrigeration system, wherein the piping component comprises a low-pressure valve pipe, a four-way valve and a low-pressure valve, wherein the low-pressure valve pipe is used for communicating one port of the four-way valve of the refrigeration system; the first silencer is arranged on the low-pressure valve pipe; the low-pressure valve pipe comprises a first connecting pipe for communicating the first silencer with the four-way valve and a second connecting pipe for communicating the first silencer with the low-pressure valve; the first silencer is provided with a silencing cavity, one end of the first connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer, and one end of the second connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer. The invention reduces indoor transmission sound and noise pollution.

Description

Piping assembly and refrigerating system

Technical Field

The invention relates to the technical field of refrigeration, in particular to a piping assembly and a refrigeration system.

Background

When a compressor of a refrigeration system such as an air conditioner, a refrigerator and the like works, the exhaust pressure of an air cylinder of the compressor is periodically and regularly changed, so that the refrigerant pressure in a piping system generates periodic pulsation, the problems of pipeline vibration, indoor sound transmission and the like are caused, and noise pollution is formed.

Disclosure of Invention

The invention mainly aims to provide a piping assembly, aiming at reducing the noise pollution of a refrigeration system.

To achieve the above object, the present invention provides a piping assembly for a refrigeration system, the piping assembly comprising:

the low-pressure valve pipe is used for communicating one port of a four-way valve of the refrigerating system with the low-pressure valve; and

the first silencer is arranged on the low-pressure valve pipe;

the low-pressure valve pipe comprises a first connecting pipe for communicating the first silencer with a four-way valve and a second connecting pipe for communicating the first silencer with a low-pressure valve;

the first silencer is provided with a silencing cavity, one end of the first connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer, and one end of the second connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer.

In an embodiment, the first connection pipe is inserted into the sound-deadening chamber by 30mm, and/or the second connection pipe is inserted into the sound-deadening chamber by 20 mm.

In one embodiment, the first silencer has a first pipe joint and a second pipe joint which are oppositely arranged, and the first pipe joint and the second pipe joint are communicated through the silencing cavity;

one end of the first connecting pipe connected with the first silencer is inserted into a silencing cavity of the first silencer from the first pipe joint;

one end of the second connecting pipe connected with the first silencer is inserted into a silencing cavity of the first silencer from the second pipe joint.

In an embodiment, the sound-absorbing cavity of the first sound absorber is cylindrical, and the axial direction of the sound-absorbing cavity corresponds to the axial direction of the compressor.

In one embodiment, the accessory hose assembly further comprises:

one end of the exhaust pipe is communicated with an exhaust port of a compressor of the refrigeration system, and the other end of the exhaust pipe is communicated with one port of the four-way valve;

and a second silencer is arranged on the exhaust pipe, and a silencing cavity is arranged in the second silencer.

In one embodiment, the second muffler comprises a shell formed with the muffling chamber, and a third pipe joint and a fourth pipe joint which are oppositely arranged at two ends of the shell;

the muffling cavity is provided with a transition cavity which is respectively communicated with the third pipe joint and the fourth pipe joint, the transition cavity is arranged from the muffling cavity to the third pipe joint in a gradually reducing mode, and the transition cavity is arranged from the muffling cavity to the fourth pipe joint in a gradually reducing mode.

In one embodiment, the discharge pipe has a connection section connecting the discharge port of the compressor and the second muffler, and the connection section is bent.

In one embodiment, the connecting section is arranged in a V-shaped bent manner or the connecting section has at least one V-shaped bent portion.

In addition, the present invention also provides a refrigeration system comprising a compressor, a four-way valve, a low pressure valve and the piping assembly as described above, the piping assembly comprising:

the first silencer is arranged on the low-pressure valve pipe;

the first silencer is provided with a silencing cavity, one end of the first connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer, and one end of the second connecting pipe, which is connected with the first silencer, is inserted into the silencing cavity of the first silencer;

the four-way valve is communicated with an exhaust port of the compressor through an exhaust pipe, and is communicated with a return air port of the compressor through a return air pipe; and a first connecting pipe of the piping assembly is communicated with one port of the four-way valve, and a second connecting pipe of the piping assembly is communicated with the low-pressure valve.

In one embodiment, the refrigeration system is an air conditioner.

According to the technical scheme, the first silencer is arranged on the low-pressure valve pipe, when the refrigerant enters the silencing cavity of the first silencer, the silencing cavity can be used for silencing noise in the pipeline, and therefore the first silencer is arranged on the low-pressure valve pipe and can be used for silencing the noise transmitted to the low-pressure valve pipe by the compressor, so that indoor transmitted sound is reduced, and noise pollution is reduced. And, because first connecting pipe and second connecting pipe all insert to the amortization intracavity of first muffler, can further improve noise cancelling effect to different depth of insertion can correspondingly reduce medium and high frequency transmission sound.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a portion of a refrigeration system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the piping assembly, compressor and four-way valve shown in FIG. 1;

FIG. 3 is a schematic view showing a coupling structure of the low pressure valve pipe and the first muffler of FIG. 1;

FIG. 4 is a graph comparing noise transmission loss curves for a simulated output interpolated muffler and a non-interpolated muffler scheme;

FIG. 5 is a schematic view of a portion of another embodiment of the refrigeration system of the present invention;

FIG. 6 is a schematic view of the piping assembly, compressor and four-way valve shown in FIG. 5;

FIG. 7 is a schematic view showing a connection structure of the exhaust pipe and the second muffler in FIG. 5;

FIG. 8 is a graph of the indoor noise spectrum of a scheme with no interpolation for the output first muffler by simulation;

FIG. 9 is a schematic diagram illustrating a peak distribution of the indoor noise spectrum shown in FIG. 8;

FIG. 10 is the indoor noise spectrum of the scheme with the simulation output first muffler band interpolation;

fig. 11 is a diagram illustrating a peak distribution of the indoor noise spectrum shown in fig. 10.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The invention provides a refrigeration system which can be an air conditioner, a refrigerator and the like.

Referring to fig. 1 and 5, a refrigeration system generally includes a compressor 10, a four-way valve 20, a condenser 30, an evaporator (not shown), a low pressure valve (not shown), a piping assembly (not shown), and the like, and the compressor 10 connects the condenser 30, the evaporator, and the low pressure valve through the piping assembly and the four-way valve 20 to constitute a refrigeration cycle circuit. The compressor 10 has a discharge port and a return port, so that the compressor 10 communicates with the four-way valve 20 through at least two lines. Wherein the exhaust port is communicated with one port of the four-way valve 20 through an exhaust pipe 101, and the return port is communicated with one port of the four-way valve 20 through a return pipe 102, that is, the exhaust pipe 101 is communicated with the condenser 30 through the four-way valve 20. One end of the low pressure valve is connected to one port of the four-way valve 20, and the other end of the low pressure valve is connected to the evaporator, that is, a pipe in which the low pressure valve is located is communicated with the return pipe 102 through the four-way valve 20.

When the compressor 10 works, the exhaust pressure of the cylinder is periodically and regularly changed, so that the refrigerant pressure in the piping assembly generates periodic pulsation, and further, the problems of pipeline vibration, indoor sound transmission and the like are caused, and noise pollution is caused.

In order to reduce noise pollution, the present invention provides a piping assembly, and referring to fig. 1 to 3, in an embodiment of the present invention, the piping assembly comprises:

a low pressure valve pipe 103 for communicating one port of the four-way valve 20 of the refrigeration system with the low pressure valve; and

a first muffler 40, wherein the first muffler 40 is arranged on the low pressure valve pipe 103;

the low pressure valve pipe 103 includes a first connection pipe 103a for communicating the first muffler 40 with the four-way valve 20 and a second connection pipe 103b for communicating the first muffler 40 with the low pressure valve;

the first muffler 40 has a sound-deadening chamber 401, and the end of the first connection pipe 103a connected to the first muffler 40 is inserted into the sound-deadening chamber 401 of the first muffler 40, and the end of the second connection pipe 103b connected to the first muffler 40 is inserted into the sound-deadening chamber 401 of the first muffler 40.

It can be understood that, when the refrigerant enters into the silencing cavity 401 of the first silencer 40, the silencing cavity 401 can silence the noise in the pipeline, and therefore, the first silencer 40 is disposed on the low pressure valve pipe 103 to silence the noise transmitted from the compressor 10 to the low pressure valve pipe 103, so as to reduce the indoor transmitted sound and reduce the noise pollution.

Further, since both the first connection pipe 103a and the second connection pipe 103b are inserted into the sound-deadening chamber 401 of the first muffler 40, the sound-deadening effect can be further improved, and different insertion depths can correspondingly reduce the medium-high frequency transmission sound. For example, the length of the first connection pipe 103a inserted into the sound-deadening chamber 401 may be about 30mm, that is, the length may be 1 to 5mm floating up or down on the basis of 30 mm. The length of the second connection pipe 103b inserted into the sound-deadening chamber 401 may be about 20mm, that is, the length may be 1 to 5mm floating up or down on the basis of 30 mm.

Of course, through the experiment, the length that first connecting pipe 103a inserts in noise damping chamber 401 is 30mm, and, when second connecting pipe 103b inserts the length in noise damping chamber 401 is 20mm, it is better to the effect that reduces medium and high frequency transmission sound. Specifically, referring to fig. 4, taking the application of the piping assembly of the present embodiment to an air conditioner as an example, the transmission loss curves of the interpolated muffler and non-interpolated muffler schemes are output by simulation, and are conditioned by the above parameters. Fig. 4 shows that the transmission loss of the curve L1 of the present application is higher at 2000Hz, 2800Hz, and 3500Hz than that of the non-interpolation scheme L2, which indicates that the interpolation scheme of the present application has better silencing effect at high frequency.

The shape of the silencing cavity 401 of the first silencer 40 is not limited, and may be spherical, cylindrical, etc., and in this embodiment, it is cylindrical, so that the length of the first connecting pipe 103a and the second connecting pipe 103b inserted into the silencing cavity 401 can be ensured, and after the installation is convenient, the axial direction of the first silencer 40 corresponds to the axial direction of the compressor 10, so as to facilitate the flow of the refrigerant.

In one embodiment, as shown in fig. 3, for easy connection and sealing, the first muffler 40 has a first pipe joint 402 and a second pipe joint 403 which are oppositely arranged, and the first pipe joint 402 and the second pipe joint 403 are communicated through the sound-deadening chamber 401;

the end of the first connection pipe 103a connected to the first muffler 40 is inserted from the first pipe joint 402 into the sound-deadening chamber 401 of the first muffler 40;

one end of the second connection pipe 103b connected to the first muffler 40 is inserted into the sound deadening chamber 401 of the first muffler 40 from the second pipe joint 403.

In this embodiment, when first muffler 40 is mounted, first and

second connection pipes

103a and 103b may be inserted one-to-one from first and second pipe joints 402 and 403 into sound deadening chamber 401, and then first and second pipe joints 402 and 403 may be welded and sealed in correspondence with first and

second connection pipes

103a and 103 b.

Furthermore, in order to facilitate welding and positioning, marks are arranged at corresponding positions of the first connecting pipe 103a and the second connecting pipe 103b, the marks may be protrusions and ribs arranged on the pipeline, or stop flanges (not shown) arranged at corresponding positions of the first connecting pipe 103a and the second connecting pipe 103b, and the stroke of the first connecting pipe 103a and the second connecting pipe 103b inserted into the first silencer 40 is limited, which is very convenient, and the situation that the first connecting pipe 103a and the second connecting pipe 103b are not in place is avoided, so that the installation efficiency is improved. And the stop flange is convenient for welding. Still further, sealing grooves (not shown) may be provided at corresponding positions of the stop flanges and the corresponding first pipe joint 402 and second pipe joint 403, so that the first pipe joint 402 and second pipe joint 403 can be inserted, positioned and sealed, and the sealing effect can be improved.

In one embodiment, referring to fig. 5-7, the accessory hose assembly comprises:

an exhaust pipe 101, one end of which 101 is used to communicate with the exhaust port of the compressor 10 of the refrigeration system, and the other end of which 101 is used to communicate with one port of the four-way valve 20;

a second muffler 50 is arranged on the exhaust pipe 101, and a silencing cavity 501 is arranged in the second muffler 50.

It can be known from the above embodiments that the exhaust pipe 101 of the compressor 10 also transmits large noise, and the second muffler 50 provided on the exhaust pipe 101 in the present embodiment can greatly reduce the transmission of noise and reduce noise pollution.

In this embodiment, the second muffler 50 may be configured similarly to the first muffler 40 with or without an internal insertion, and since the closer to the exhaust port, the larger the low-frequency pressure pulsation of the pipe, the more effective the muffler without an internal insertion is in reducing the low-frequency transmission sound. Therefore, when the present embodiment is combined with the above-mentioned embodiment of the first muffler 40, that is, the first muffler 40 in the present embodiment adopts a scheme with interpolation, and the second muffler 50 adopts a scheme without interpolation, it can reduce both high-frequency transmission sound and low-frequency transmission sound, so that the noise transmission of the whole air conditioner is greatly reduced, and the noise pollution is reduced.

It should be noted that the solution with interpolation means that the first connection pipe 103a and the second connection pipe 103b of the low pressure valve pipe 103 are inserted into the corresponding muffling chamber 401 of the first muffler 40, or the third connection pipe 101a and the fourth connection pipe 101b of the exhaust pipe 101 are inserted into the corresponding second muffler 50.

Referring to fig. 8 to 11, taking the application of the pipe assembly of the present embodiment to an air conditioner as an example, the noise transmission loss curve after the first muffler 40 is installed or the first muffler 40 and the second inserted muffler 50 are installed is output through simulation.

Fig. 8 and 9 show the indoor noise spectrum of the piping system equipped with the first muffler 40 without interpolation, where L3 shows the blowing noise (compressor off) and L4 shows the heating noise (compressor on). It can be seen from the frequency spectrum that the scheme has high noise peaks near the low frequency of 120Hz and the high frequency of 1600Hz, 2800Hz and 3500Hz, and still has obvious problems of sound transmission of the compressor 10 at the low frequency and the high frequency.

Fig. 9 shows the indoor noise spectrum of the piping system in which the first muffler 40 and the second muffler 5 are installed, with the first muffler 40 interpolated, with the blowing noise (compressor off) at L5 and the heating noise (compressor on) at L6. It can be seen from the frequency spectrum that the scheme has no obvious noise peak value in the vicinity of low frequency 120Hz and high frequency 1600Hz, 2800Hz and 3500Hz, and the problem of the transmission sound of the compressor 10 is greatly improved.

In an embodiment, referring to fig. 7, in order to improve the sound attenuation effect, the second muffler 50 includes a housing formed with the sound attenuation chamber 501, and a third pipe joint 502 and a fourth pipe joint 503 oppositely disposed at two ends of the housing, where the pipe joints are disposed to facilitate connection of the exhaust pipe 101;

the muffling cavity 501 is provided with a transition cavity 501a which is respectively communicated with the third pipe joint 502 and the fourth pipe joint 503, the transition cavity 501a is arranged from the muffling cavity 501 to the third pipe joint 502 in a tapered manner, and the transition cavity 501a is arranged from the muffling cavity 501 to the fourth pipe joint 503 in a tapered manner. The transition cavity 501a provides a gradually changing space between the muffling cavity 501 and the exhaust pipe 101, so that the flow channel is prevented from suddenly becoming larger or smaller to generate abnormal sound, and thus noise can be reduced.

Further, in order to reduce noise transmission, the discharge pipe 101 has a connection section 101a connecting the discharge port of the compressor 10 and the second muffler 50, and the connection section 101a is bent. The connecting section 101a is bent, so that the rigidity of the exhaust pipe 101 can be reduced, the vibration stress of the exhaust pipe 101 close to the exhaust port can be reduced, and the noise transmission can be reduced. It can be understood that the connecting section 101a is bent in a V shape or the connecting section 101a has at least one V-shaped bent portion, which can further reduce the rigidity of the exhaust pipe 101.

It can be understood that, because the above-mentioned piping assembly is used in the refrigeration system of the present invention, the embodiment of the refrigeration system of the present invention includes all technical solutions of all embodiments of the above-mentioned piping assembly, and the achieved technical effects are also completely the same, and are not described herein again.

Claims

1. A piping assembly for a refrigeration system, the piping assembly comprising:

the first silencer is arranged on the low-pressure valve pipe;

2. The piping assembly according to claim 1, wherein the length of insertion of said first connecting pipe into said sound-deadening chamber is 30mm, and/or the length of insertion of said second connecting pipe into said sound-deadening chamber is 20 mm.

3. The piping assembly of claim 2, wherein the first muffler has a first pipe joint and a second pipe joint disposed opposite each other, the first pipe joint and the second pipe joint communicating through the muffling chamber;

4. The piping assembly of claim 3, wherein the sound-deadening chamber of the first muffler has a columnar shape and is disposed in an axial direction corresponding to an axial direction of the compressor.

5. The accessory piping assembly of any of claims 1-4, further comprising:

6. The piping assembly according to claim 5, wherein the second muffler includes a housing formed with the muffling chamber, a third pipe joint and a fourth pipe joint provided at both ends of the housing in opposition;

7. The piping assembly of claim 5, wherein the discharge pipe has a connection section connecting the discharge port of the compressor and the second muffler, the connection section being bent.

8. The piping assembly of claim 7 wherein said connecting section is arranged in a V-bend configuration or said connecting section has at least one V-bend.

9. A refrigeration system comprising a compressor, a four-way valve, a low pressure valve, and the piping assembly of any of claims 1-8, wherein the four-way valve is in communication with an exhaust port of the compressor through an exhaust pipe, and wherein the four-way valve is in communication with a return port of the compressor through a return pipe; and a first connecting pipe of the piping assembly is communicated with one port of the four-way valve, and a second connecting pipe of the piping assembly is communicated with the low-pressure valve.

10. The refrigeration system of claim 9 wherein said refrigeration system is an air conditioner.